Video Files

Video files from the textbook and other math resources.

Congruent Triangles

Virtual Nerd videos on congruent triangles

Finding missing angles for isosceles triangles

Identifying congruent parts

What does congruent mean?

Using SSS and SAS to show congruency

Using ASA, AAS and HL to show congruency

Corresponding parts of congruent triangles (CPCTC)

What are similar figures?

Theorems

What is a theorem?

Converse of a theorem

Triangle Sum Theorem

The Hypotenuse-Leg Congruence Theorem

Angles and lines

Constructing a perpendicular bisector

Constructing parallel lines (corresponding angles method)

Constructing an angle bisector

Pythagorean theorem proof plus constructions for angle bisector and parallel lines

Constructing a parallel line through a point (rhombus method)

Constructing a parallel line (translated triangle method)

Triangles

Copying a triangle

Constructing a triangle median

Constructing a triangle given three sides

Virtual Nerd videos for chapter 8

Law of Cosines

Law of sines

All construction videos at Math Open Reference

Math open reference table of contents